Usage History of 'diallel'

The following chart shows how frequently 'diallel' appeared in printed materials over time. For example, the word 'diallel' occurred 4 times in books in 1826 and 710 times in 2008. From 1826 to 2008, the word 'diallel' was used a total of 42,233 times in books scanned by Google. See Reference: Google Ngram project.

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